347506661 has 4 divisors (see below), whose sum is σ = 349153824. Its totient is φ = 345859500.

The previous prime is 347506651. The next prime is 347506667. The reversal of 347506661 is 166605743.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166605743 = 281 ⋅592903.

It is a cyclic number.

It is not a de Polignac number, because 347506661 - 2¹⁴ = 347490277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (347506667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 823265 + ... + 823686.

It is an arithmetic number, because the mean of its divisors is an integer number (87288456).

Almost surely, 2^347506661 is an apocalyptic number.

It is an amenable number.

347506661 is a deficient number, since it is larger than the sum of its proper divisors (1647163).

347506661 is a wasteful number, since it uses less digits than its factorization.

347506661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647162.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 347506661 is about 18641.5305433862. The cubic root of 347506661 is about 703.0524260001.

The spelling of 347506661 in words is "three hundred forty-seven million, five hundred six thousand, six hundred sixty-one".